The woman who police say was shot and run over with a truck by her father in front of a Texas courthouse had accused both her father and her uncle of sexually assaulting her, authorities told ABCNews.com today.

Bartholomew Granger, 41, was scheduled to appear in a Beaumont, Texas, court Wednesday afternoon and his 20-year-old daughter was expected to continue her testimony against him that she began Tuesday in his sexual assault trial, police said.

Granger, sitting in his truck, opened fire at the courthouse as his ex-wife and daughter were about the enter the building, wounding both of them, police said. He then drove his truck over his daughter, according to police.

His daughter, whose name is being withheld by ABC News since she is the alleged victim of sexual assault, is hospitalized in critical condition with "numerous extensive injuries," according to Beaumont Police Department Officer Carol Riley.

"She is still critical," Riley told ABCNews.com today. "She's still hanging in there."

The suspected gunman's brother Lyndon Granger had been out on bond for sexually assaulting the same woman, but after the shooting, a judge revoked the bond Wednesday and issued a warrant for his arrest, Riley said.

Granger was arrested in front of cameras during a news conference on Wednesday night. "I didn't do anything," Granger said as a sheriff's deputy handcuffed him and took him away.

When asked if Bartholomew and Lyndon Granger were accused of sexually assaulting the same child, Riley responded, "Yes, the same child," and confirmed that the child was Bartholomew Granger's 20-year-old daughter.

Bartholomew Granger's attorney Rife Kimler did not respond to requests for comment from ABCNews.com.

The shooting at the courthouse erupted at 11:21 a.m. Wednesday when Granger allegedly began firing from a truck in front of the Jefferson County Courthouse.

In addition to his daughter and ex-wife, Granger shot at two bystanders, killing 79-year-old Minnie Ray Seabolt, police said.

Nine officers responded when the shooting started.

After Granger's truck was disabled, he ran about one block to a business and took hostages inside the establishment.

The hostages, however, refused "to be victims," said Beaumont Police Chief James Singletary at a press conference. "They took the gun away from him and unlocked the door for the SWAT team."

Singletary added, the hostages did "a great job and we want to thank them." The hostages' names have not been released.

Granger suffered some gunshot wounds during the confrontation with law enforcement, according to Jefferson County Sheriff Mitch Woods. He has been released from the hospital and is in custody in the Jefferson County Jail.

He has been charged with one count of murder and his bond for the aggravated sexual assault charge was revoked.

He is expected to be arraigned on murder and attempted murder charges, but no court date has been set.

Granger's ex-wife and the second injured bystander have both been treated and released from the hospital.

This is the second courthouse shooting over this past week. On March 7, a shooting outside the Tulsa County Courthouse in Oklahoma left one deputy and three others injured. A barefoot man went to the courthouse plaza and apparently began shooting randomly.